Nut lock



March 23 1926.

G. E. MONROE NUT LOCK Filed Des. e, 19,24k

INV EN TOR.

TORNE Y.

Patented Mar. 23, 1926..

nui-ren vs'iaias yGEORGE E. MONROE, OF DETROIT, MICHIGAN.

NUT LOCK.

Application filed December To @ZZ whom it may concern:

Be it known that I, GEORGE E. MONROE, a citizen of the United States, residing at Detroit. in the county of layne and State of Michigan, have invented a lnew and useful In'iprovement in Nut Locks, of which he following is a specification.

This invention is in part an improvement on the subject mattei' of ymy pending application improvements in nut locks Serial Number 693,696, filed February 18th, 192i. In both inventions the construction is somewhat similar in that an upper fiat plate and a companion plate having flexed extensions areused in combination, but in the prior application aforesaid the two plates are tirmly united at their'margins, Whereas in the present invention the companion plate is provided `with a transverse groove 'arranged substantially centrally of the said plate, and

' the sides of the 4groove have bevelledv guides adapted to :receive similarly bevelled redges of a downwardly projecting portion on the underside of the top plate.

One of the objects of Vthe ypresent invention is to simplify the method of manufacture while at the same time providing a nut lock that will bequite as positive in action; and another object of the invention is to provide a depressed portion of the companion plate centrallyof the nut lock which will form a positive stop and prevent the flexed extensions of the said companion plate from being flattened out entirely when subjected to excessive pressure.

`With these and other objects in view my invention consists in certain novel method of construction and combination of parts hereinafter more fully described with the aid of the accompanying drawings and claimed.

Figure 1 illustrates a plan view, and

Figure 2 a side elevation of the nut lock when applied.

'Figure 3 is a blank form :from which an embodiment Oi' the top plate is made.

Figure 4 shows a side elevation of a top plate when ready `for assembly.

Figure 5 shows a plan view of the companion plate.

Figure 6 is a detail illustration of a slightly modified form of construction of the top plate.

Referring more particularly to the drawings, 1 and 2 designate a bolt and nut re- 6, 1924. Serial No. 7545297.

spectively, both of which may be of any desired construction, and 3 and tindicate two pieces of plate held together thereby.

The nut lock vConsists essentially oi the centrally ofthe top plate 5 and integral therewith is a downwardly projecting transverse portion 7, the sides 8 of which are preferably bevelled and are adapted to fit within the correspondingly bevelled guides 9 in which the sides of thetransverse groove 10 of the companion plate 6 terminate.

On the upper face of the top plate 5 a projection 11 is formed. This projection is so located that the side of the nut 2 will come in contact with the side of it when the nut has been screwed down into close proximity with the 'top plate. As the nut is tightened suflicient pressure can be exerted tovdepress the top plate 5 by flexing'the extensions 16 of the companion plate (i, `but on the other hand the projection effectively prevents thenut from slacking back by accidental rotation when the nut is subjected to vibration.

In the underside of the downwardly proj ecting transverse portion 7 keyways 12 may be supplied. In that case upwardly projecting guide pins or keys 13 should be arranged in the groove 10 to register with the said keyways. For particularly in nut locks of larger sizes I find the keys 13 and keyways 12 of assist-ance in assembling the parts.

Figure 6 shows a modification of the above described design. On the underside of the downwardly projecting port-ion 7 small projections 2O are formed. In that case depressions take the place of the keys 13 in the groove 10. In this way positive means ofl holding the top plate 5 and the companion plate 6 in correct relation to each other are provided.

The transverse groove 10 of' the companion plate is formed within a centrally located depressed portion 21 of the stock and the sides of the groove which form the guides 9 extend upwardly and are there united to the inner ends of the flexed extensions 16 which project therefrom, and the outer ends of the said extensions are flexedu in the opposite direction, and are adapted to torni bearing surfaces 1T against which the work, in the present case the plate 3, rests.

As the nnt 2 is tightened the curvature ot' the i'iexed extensions 16 is flattened out, and

therefore it is necessary to malte the eonr, panion plate 6, and particularly the extensions 1G, et a high grade ot soring steel. As the underside ot the depressed portion 21 is rnaterially lower than the inner ends ot' the extensions 16, the said depressed portion forms a stop and prevents the said extensions from heilig completely flattened ont.

Referring now incre narticularly to Fig ures and el, it will be noted that prefer to inalre the top plate 5 out of a blank as shown in Figure The ends 7 which are ot lesser width than the central portion oit the top plate 5, are doubled under across the lines indicated at 19, so that the senil-circular openings 14 each resigter with one side 01"' the hole 14; and the edges 1S, when the ends 7 have been doubled under7 are in close proximity to each otheri Thus the downwardly projecting portion 7 inay be iornied7 and the bevelled edges 8 and the keyways 12 shaped without the necessity et expending tirne and labor on machining;7 or having;` to resort to heavy and complicated press work. Similarly the companion plate 6 can easily be stamped out in the torni shown in Figure 5.

ln the foregoing I have described the preterred embodiment of iny invention` it is however understood that I may malte alterations and inodiications therein7 provided the said alterati-ons and inodilicat-ions tall within the scope otl what l claim.

llaving thus described iny invent-ion what lesire to secure by Letters Patent is:

1. A nut lock of the character described comprisinga top plate having a hole therethrough and adapted to torni a fiat hearing surface for the underside of a nut,l a projection adapted to prevent accidental rotation of a nut there-on, and a hole therethrough for the passage of a bolt, in combination with a companion plate having a hole registering with said lirst named hole, resilient eff-:tensions adapted to exert upward pressure against the underside of the top plate, said plates being; held in engagement one with the other by means of a project-ion on the underside oi the top plate which cooperates with a groove in the top of theV companion plate.

2. A nut loclr described in clairn 1, wherein the underside of that portion or" the. companion plate in which the groove is toi-ined extends downwards and constitutes a stop to prevent the complete flattening ot the resilient extensions.

3. nut lock ot' the character described comprising a top plate having a hole therethrough, and a companion plate having,- flexed resilient extensions and a hole therethrough, in combination with vmeans for slid-ably engaging the said plates one with the other transversely ot their length7 and ineans for locking the two plates one with the other when the aforesaid holes register with each other.

GEO. E. MONROE. 

